---
id: CVE-2026-76440
title: >-
  As part of Cisco's ongoing commitment to proactive security and product
  quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager
  engineering team has conducted a comprehensive internal security review
summary: >-
  As part of Cisco's ongoing commitment to proactive security and product
  quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager
  engineering team has conducted a comprehensive internal security review. This
  review r…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-23
vendor: Cisco
product: Cisco Secure Email
affected:
  - secure_email 14.0.0-698
  - secure_email 13.5.1-277
  - secure_email 13.0.0-392
  - secure_email 14.2.0-620
  - secure_email 13.0.5-007
  - secure_email 13.5.4-038
  - secure_email 14.2.1-020
  - secure_email 14.3.0-032
  - secure_email 15.0.0-104
  - secure_email 15.0.1-030
  - secure_email 15.5.0-048
  - secure_email 15.5.1-055
  - secure_email 15.5.2-018
  - secure_email 16.0.0-050
  - secure_email 15.0.3-002
  - secure_email 16.0.0-054
  - secure_email 15.5.3-022
  - secure_email 16.0.1-017
  - secure_email 15.5.4-012
  - secure_email 16.0.4-016
  - secure_email 15.0.5-016
  - secure_email 16.0.2-112
  - secure_email 16.0.3-044
  - secure_email 15.5.5-014
  - secure_email_and_web_manager 13.6.2-023
  - secure_email_and_web_manager 13.6.2-078
  - secure_email_and_web_manager 13.0.0-249
  - secure_email_and_web_manager 13.0.0-277
  - secure_email_and_web_manager 13.8.1-052
  - secure_email_and_web_manager 13.8.1-068
  - secure_email_and_web_manager 13.8.1-074
  - secure_email_and_web_manager 14.0.0-404
  - secure_email_and_web_manager 12.8.1-002
  - secure_email_and_web_manager 14.1.0-227
  - secure_email_and_web_manager 13.6.1-201
  - secure_email_and_web_manager 14.2.0-203
  - secure_email_and_web_manager 14.2.0-212
  - secure_email_and_web_manager 12.8.1-021
  - secure_email_and_web_manager 13.8.1-108
  - secure_email_and_web_manager 14.2.0-224
  - secure_email_and_web_manager 14.3.0-120
  - secure_email_and_web_manager 15.0.0-334
  - secure_email_and_web_manager 15.5.1-024
  - secure_email_and_web_manager 15.5.1-029
  - secure_email_and_web_manager 15.5.2-005
  - secure_email_and_web_manager 16.0.0-195
  - secure_email_and_web_manager 15.5.3-017
  - secure_email_and_web_manager 16.0.1-010
  - secure_email_and_web_manager 15.0.1-035
  - secure_email_and_web_manager 16.0.2-088
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T18:19:12.950'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76440'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm
    label: psirt@cisco.com
  - url: >-
      https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://software.cisco.com'
tags:
  - nvd
  - cve.org
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00623
epssPercentile: 0.47661
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-14T19:11:43.414223Z'
ingestedAt: '2026-09-14T16:34:40.810Z'
---

## Overview

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.

The vulnerabilities tracked by CVE-2026-76440 are related to path traversal issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-23.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **cisco-sa-hardening-esa-dfCrfXkm** · Cisco · affected: Cisco Secure Email and Web Manager, Cisco Secure Email · updated 2026-09-14 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm)